Serialize() public method

public Serialize ( ) : string
return string
        public void testSale()
        {
            sale sale = new sale();
            sale.orderId = "12344";
            sale.amount = 106;
            sale.orderSource = orderSourceType.ecommerce;
            cardType card = new cardType();
            card.type = methodOfPaymentTypeEnum.VI;
            card.number = "4100000000000002";
            card.expDate = "1210";
            sale.card = card;

            batchRequest.addSale(sale);

            Assert.AreEqual(1, batchRequest.getNumSale());
            Assert.AreEqual(sale.amount, batchRequest.getSumOfSale());

            mockLitleFile.Verify(litleFile => litleFile.createRandomFile(It.IsAny<String>(), It.IsAny<String>(), It.IsAny<String>(), mockLitleTime.Object));
            mockLitleFile.Verify(litleFile => litleFile.AppendLineToFile(mockFilePath, sale.Serialize()));
        }